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Our shower is supplied from the cold water supply only and it heats the water electrically. The temperature is thermostatically controlled so it does not matter if the water pressure varies. The knob setting the water temperature, although it has radial marker lines, turns smoothly with no sign of discrete positions. There is another knob for "high", "medium" and "cold" which we leave on high. How is the heater likely to be controlled? Will the power be being switched on and off fairly rapidly or will there be some sort of "analogue" control? Thincat ( talk) 09:15, 11 February 2022 (UTC)
One possibility, of many, is Infinite switch Greglocock ( talk) 09:38, 11 February 2022 (UTC)
A coral diagram seems to be a good way to depict speciation. In the illustration here, created by Lajos.rozsa, the first detail view appears to be at a moment just before the species are separating. But the magnified picture (second from top) looks pretty homogenous. Shouldn't there be some signs of the impending separation, such as a reduced reproduction rate in the middle of the top border? ◅ Sebastian 09:57, 11 February 2022 (UTC)
While the diagram type has, to my knowledge, no explicit rule for the x-coordinate of any node, I would say that expediency demands that it represents the closeness (by phenotype or genotype) to any of the two resulting species, at least in the vicinity of a speciation event.There's no such thing as "the vicinity of a speciation event". For speciation to occur two groups of the same species need to be geographically separated for a large number of generations. There's no 'split' in the family tree caused by a slow dwindling of reproduction rates in that 'area'. The x-coordinate in these diagrams (which are not graphs) is just an abstract way to visualize separateness. The way the lines waiver and go off at various angles is misleading. nagual design 15:44, 12 February 2022 (UTC)
Hello, I am the author of the figure. Please do not take the minor details of the picture too seriously, in fact mine is a botanical version of the figure by Maddison and Maddison 1992 which suffers from the same imprecision. Since the system does not allow me to include a figure, I give a link: https://www.cs.ubc.ca/~tmm/talks/birs04/mgp00010.html In my Systematic Biology paper a figure with similar meaning is more fortunate, I can send you a pdf if you email me. In this, a math definition of a coral is also given. Again, apologies for the confusion. Cheers J Podani, podani at ludens dot elte dot hu — Preceding unsigned comment added by 2001:4C4D:19C4:6600:E57C:8BDF:675F:484A ( talk) 15:11, 16 February 2022 (UTC)
Been wondering which electrons of a metal atom contribute to the electron gas in metals and which ones remain attached to nuclei. I was wondering specifically for lithium. Jo-Jo Eumerus ( talk) 13:41, 11 February 2022 (UTC)
Is there a forum about biohacking that is reputable?-- 2A02:908:426:D280:E489:4BB:F7DD:7E43 ( talk) 21:35, 11 February 2022 (UTC)
Science desk | ||
---|---|---|
< February 10 | << Jan | February | Mar >> | February 12 > |
Welcome to the Wikipedia Science Reference Desk Archives |
---|
The page you are currently viewing is a transcluded archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages. |
Our shower is supplied from the cold water supply only and it heats the water electrically. The temperature is thermostatically controlled so it does not matter if the water pressure varies. The knob setting the water temperature, although it has radial marker lines, turns smoothly with no sign of discrete positions. There is another knob for "high", "medium" and "cold" which we leave on high. How is the heater likely to be controlled? Will the power be being switched on and off fairly rapidly or will there be some sort of "analogue" control? Thincat ( talk) 09:15, 11 February 2022 (UTC)
One possibility, of many, is Infinite switch Greglocock ( talk) 09:38, 11 February 2022 (UTC)
A coral diagram seems to be a good way to depict speciation. In the illustration here, created by Lajos.rozsa, the first detail view appears to be at a moment just before the species are separating. But the magnified picture (second from top) looks pretty homogenous. Shouldn't there be some signs of the impending separation, such as a reduced reproduction rate in the middle of the top border? ◅ Sebastian 09:57, 11 February 2022 (UTC)
While the diagram type has, to my knowledge, no explicit rule for the x-coordinate of any node, I would say that expediency demands that it represents the closeness (by phenotype or genotype) to any of the two resulting species, at least in the vicinity of a speciation event.There's no such thing as "the vicinity of a speciation event". For speciation to occur two groups of the same species need to be geographically separated for a large number of generations. There's no 'split' in the family tree caused by a slow dwindling of reproduction rates in that 'area'. The x-coordinate in these diagrams (which are not graphs) is just an abstract way to visualize separateness. The way the lines waiver and go off at various angles is misleading. nagual design 15:44, 12 February 2022 (UTC)
Hello, I am the author of the figure. Please do not take the minor details of the picture too seriously, in fact mine is a botanical version of the figure by Maddison and Maddison 1992 which suffers from the same imprecision. Since the system does not allow me to include a figure, I give a link: https://www.cs.ubc.ca/~tmm/talks/birs04/mgp00010.html In my Systematic Biology paper a figure with similar meaning is more fortunate, I can send you a pdf if you email me. In this, a math definition of a coral is also given. Again, apologies for the confusion. Cheers J Podani, podani at ludens dot elte dot hu — Preceding unsigned comment added by 2001:4C4D:19C4:6600:E57C:8BDF:675F:484A ( talk) 15:11, 16 February 2022 (UTC)
Been wondering which electrons of a metal atom contribute to the electron gas in metals and which ones remain attached to nuclei. I was wondering specifically for lithium. Jo-Jo Eumerus ( talk) 13:41, 11 February 2022 (UTC)
Is there a forum about biohacking that is reputable?-- 2A02:908:426:D280:E489:4BB:F7DD:7E43 ( talk) 21:35, 11 February 2022 (UTC)